Question

I have an NSString that holds something like this:

4434332124

How can I make that into something like this?

443-433-2124

Answer 1

This can be done in only two lines just use NSString’s stringWithFormat method and chop up the phone number into individual substrings and glue the whole thing together in your format string. Something like this:

NSString *sPhone = @"4434332124";

NSString *formatted = [NSString stringWithFormat: @"%@-%@-%@", [sPhone substringWithRange:NSMakeRange(A,B)],[sPhone substringWithRange:NSMakeRange(B,C)],
                           [sPhone substringWithRange:NSMakeRange(C,D)]];

EDIT: Working Code

NSString *formatted = [NSString stringWithFormat: @"%@-%@-%@", [sPhone substringWithRange:NSMakeRange(0,3)],[sPhone substringWithRange:NSMakeRange(3,3)],
                           [sPhone substringWithRange:NSMakeRange(6,4)]];